Putin's Public Enemy – The Russian opposition leader Alexey Navalny tells Lesley Stahl that President Vladimir Putin poisoned him with a banned nerve agent that's said to be 10 times more powerful than sarin. Dr. Fauci - The director of the National Institute of Allergy and Infectious Diseases gives Dr. Jon LaPook the latest information on how the U.S. is faring in the pandemic as the number of new cases of COVID-19 begins to increase. Hell Flight – Early in the pandemic, dozens of cruise ship passengers sick or infected with COVID-19 returned to the United States on a hellish charter flight. As Sharyn Alfonsi reports, they were inexplicably allowed by the Centers for Disease Control and Prevention to mix with unsuspecting travelers in the world's busiest airport and risk spreading the virus.